Big bags for pellets — biofuel packaging from the manufacturer
Pellets are lighter than grain: the bulk density of wood pellets is 600–680 kg/m³, so a standard ~1 m³ big bag holds only about 650 kg. A full tonne of pellets needs the larger 95×95×180 cm size. Moisture protection is mandatory — a wet pellet crumbles into dust, so we use laminated fabric or a polyethylene liner.
from UAH 200/pc
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How many pellets fit in a big bag
Capacity depends on the fuel type. The table shows bulk density of the most common fuels, the actual weight in a ~1 m³ bag and the size we recommend for a full tonne:
| Fuel | Bulk density | Weight in a ~1 m³ bag | Size for 1000 kg |
|---|---|---|---|
| Wood pellets 6/8 mm | 600–680 kg/m³ | ≈ 650 kg | 95×95×180 cm |
| Sunflower husk pellets | 550–600 kg/m³ | ≈ 580 kg | 95×95×190 cm |
| Straw pellets | 500–550 kg/m³ | ≈ 520 kg | custom size |
| Wood chips, sawdust | 250–350 kg/m³ | ≈ 300 kg | oversized volume to order |
Why moisture protection is critical for pellets
A pellet is pressed without glue and held together by lignin: once it absorbs moisture it swells, crumbles and loses heating value, while the dust clogs the boiler auger. That is why we use laminated fabric or a 90–120 µm polyethylene liner — it blocks condensation and atmospheric moisture for the whole storage period.
For outdoor storage you also need a top filling skirt and UV-stabilised fabric: without the stabiliser, polypropylene loses strength after a season in the sun.
Discharging into a boiler, auger or hopper
Boiler houses discharge pellets in doses — that requires a bottom discharge spout: untie the sleeve and the pellets flow into the hopper without dust or losses, tie it back to stop the flow. The bag stays intact and, with a 6:1 safety factor, works for 2–3 cycles in your own logistics.
Price and seasonality
A big bag for pellets costs from UAH 200/pc depending on size, lamination or liner and batch volume. Packaging orders peak in August–October, so summer purchases are cheaper and faster. Standard sizes ship from our Zhytomyr warehouse in 1 working day. Minimum order — 50 pcs; free delivery for orders over 5,000 pcs.
Typical Sizes
| Name | Dimensions | Load Capacity | Tare Weight |
|---|---|---|---|
| Big bag 90×90×120 | 90 × 90 × 120 cm | ≈ 700 kg of pellets | 2.5–3.0 kg |
| Big bag 90×90×160 | 90 × 90 × 160 cm | ≈ 840 kg of pellets | 3.0–3.5 kg |
| Big bag 95×95×180 | 95 × 95 × 180 cm | ≈ 1000 kg of pellets | 3.5–4.5 kg |
* Sizes are approximate. We manufacture according to customer's custom dimensions.
FAQ
How many pellets does a standard big bag hold?
A ~1 m³ big bag holds about 650 kg of wood pellets (bulk density 600–680 kg/m³). For a full tonne you need the larger 95×95×180 cm size.
Which big bag do I need for 1 tonne of pellets?
95×95×180 cm made of laminated fabric or with a polyethylene liner. Add a bottom discharge spout for unloading into a hopper or auger.
Can pellets be stored outdoors in big bags?
Yes, under three conditions: UV-stabilised fabric, a top filling skirt and a liner or lamination against moisture. Ideally — under a canopy on pallets.
Are pellet big bags single-use or reusable?
Both. Shipments to customers usually use single-trip SF 5:1 bags; for a boiler house's own logistics, reusable SF 6:1 bags with a spout withstand 2–3 full cycles.